.bigDiv {
	width: 990px;
	margin: 0 auto;
}

.head {
	width: 1000px;
	height: 150px;
	margin: 0 auto;
}

.bottom {
	width: 1000px;
	height: 170px;
	margin: 0 auto;
}

a {
	color: black;
}
